Novel and Convenient Synthesis of Benzofurans from Dihydrocoumarins |
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| Authors: | Sharona Shachan‐Tov Aryeh A. Frimer |
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| Affiliation: | Ethel and David Resnick Chair in Active Oxygen Chemistry, Department of Chemistry, Bar‐Ilan University, Ramat Gan 52900, Israel |
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| Abstract: | 7‐Hydroxy‐3,4‐dihydrocoumarin‐4‐carboxylic acid ( 7 ), conveniently prepared from m‐resorcinol and maleic anhydride, was surprisingly transformed by acid anhydride and pyridine into the corresponding ketone, 4‐alkanoyl analog 11 . The latter reacted in turn with acidic alcohol yielding benzofuran‐3‐yl‐acetic ester 16. |
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